The Rock Lock 53 model is for STANDARD tension rods. 

*If you own Gretsch USA Custom, Pearl Reference, Craviotto, Noble & Cooley, or DW Collectors drums, please note: these drums typically use extra large stainless steel tension rods, making it more difficult to fasten Rock Locks on. Don't worry, the 53s will still work! Make sure to line up the tension rod with one of the squares inside the 12-point star and gently wiggle the Rock Lock on - it may be tough the first time, but after that it'll be much easier. Enjoy!